Oldest Functioning, Living Human Body Part:

Reuters reports:

Bernt Aune's transplanted cornea has been in use for a record 123 years -- since before the Eiffel Tower was built.... Aune, an 80-year-old Norwegian and former ambulance driver, ... had a cornea transplanted into his right eye in 1958 from the body of an elderly man who was born in June 1885....

The oldest person who had documents to prove it was France's Jeanne Calment, who was 122 old when she died in 1997, according to the Guinness Book of Records....

Thanks to GeekPress for the pointer.